US11524332B2 - Array-spraying additive manufacturing apparatus and method for manufacturing large-sized equiaxed crystal aluminum alloy ingot - Google Patents

Array-spraying additive manufacturing apparatus and method for manufacturing large-sized equiaxed crystal aluminum alloy ingot Download PDF

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US11524332B2
US11524332B2 US17/288,038 US201817288038A US11524332B2 US 11524332 B2 US11524332 B2 US 11524332B2 US 201817288038 A US201817288038 A US 201817288038A US 11524332 B2 US11524332 B2 US 11524332B2
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controller
liquid aluminum
condensing
nozzles
chamber
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US20210362217A1 (en
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Jiao Zhang
Baode Sun
Qing Dong
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/115—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by spraying molten metal, i.e. spray sintering, spray casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/22—Direct deposition of molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
    • B22D23/003—Moulding by spraying metal on a surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/50—Means for feeding of material, e.g. heads
    • B22F12/53—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/50—Means for feeding of material, e.g. heads
    • B22F12/55—Two or more means for feeding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0408—Light metal alloys
    • C22C1/0416—Aluminium-based alloys
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/123—Spraying molten metal
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • C23C4/185—Separation of the coating from the substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/20—Cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/30—Platforms or substrates
    • B22F12/33—Platforms or substrates translatory in the deposition plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present disclosure relates to the technical field of metallurgy, and in particular to an array-spraying additive manufacturing apparatus and method for manufacturing large-sized equiaxed crystal aluminum alloy ingot.
  • Semi-continuous casting is a process, conventionally used in industry, for manufacturing large-size aluminum alloy ingots, mainly comprising two methods: one being hot top casting, and the other being direct chill casting.
  • hot top casting is that the liquid level is stable during the casting process, but a relatively-deep liquid cavity is generated in the center of the ingot, and the solidified structure contains a large area of columnar crystal zone. Macroscopic segregation is severe from the center to the edge of the ingot, and relatively-high internal stress remains, so that the ingot is easy to crack with low yield, which is not suitable for the production of aluminum alloy ingot with high alloy content.
  • the additive manufacturing has changed the casting mode of large-volume solidification of liquid aluminum.
  • Large-sized ingots are prepared by continuous melting and superposition of microelement zones to avoid the formation of liquid cavity.
  • the increase in cooling speed is conducive to the formation of equiaxed crystal structure and overcomes a range of shortcomings of conventional casting methods.
  • the typical methods mainly comprise spray forming and selective laser remelting. Spray forming can be used to prepare ingots without macroscopic segregation of components, but the aluminum ingots prepared by this method have high porosity, with non-compact structure and severe oxidation.
  • the method of selective laser remelting does not have the issues above, and the solidified structure is ideal, nonetheless it is difficult to be applied in large-scale production of large-sized industrial ingot due to its low production efficiency, long time required, and high cost.
  • there is no method to form large-sized and special-shaped ingots with segregation-free equiaxed crystal structure by making large-volume melts sprayed via generating negative pressure to form a stable continuous metal liquid column, and quickly condensed.
  • the present disclosure provides an array-spraying additive manufacturing apparatus and method for manufacturing large-sized equiaxed crystal aluminum alloy ingot, which sprays large-volume melts by generating negative pressure so as to form a stable continuous metal liquid column, makes, through a design of an array arrangement of multiple nozzles, large-volume liquid aluminum evenly dispersed to form dozens to even hundreds of continuous liquid flows, and enables, by combining three-dimensional movement of a rapid condensing table below, large-area spreading of the thin liquid aluminum which is then continuously solidified to form ingots.
  • the method has high production efficiency and can prepare an ultra-large-sized aluminum alloy ingots, the solidified structure of which is an equiaxed crystal and which has no macroscopic segregation.
  • the present disclosure comprises: a liquid aluminum spraying mechanism having array nozzles and disposed in an atmospheric pressure chamber, and a movable condensing mechanism and a controller which are disposed in the atmospheric pressure chamber and below the liquid aluminum spraying mechanism, wherein the controller sends an upward guiding command to a release controller and issues a three-dimensional movement command to the movable condensing mechanism respectively, such that liquid aluminum in the liquid aluminum spraying mechanism is sprayed to the surface of the movable condensing mechanism in a form of a continuous array of liquid flows according to a preset path and is rapidly condensed to form the ingot.
  • the atmospheric pressure chamber is provided with a vacuum pump connected to the controller, and the internal air pressure is further adjusted through the vacuum pump.
  • the atmospheric pressure chamber is connected with an inert gas source to provide inert gas protection for inside of the chamber.
  • the liquid aluminum spraying mechanism comprises: the release controller, a liquid aluminum chamber, and the array nozzles, wherein the array nozzles are disposed at the bottom of the liquid aluminum chamber, and
  • the release controller is connected with the controller to control the starting and ending of the liquid aluminum spraying process.
  • the release controller comprises an upward movement controller and plug pole, wherein the plug pole is matched with the array nozzles, and the upward movement controller is respectively connected with the plug pole and the controller to receive a release command and control the plug pole to lift upward to release the array nozzles.
  • In-chamber heaters which are connected with the controller are further disposed inside the liquid aluminum chamber.
  • a liquid level meter is disposed in the liquid aluminum chamber.
  • a liquid inlet trench with a gate is disposed at one side of the liquid aluminum chamber in order to allow input of the liquid aluminum.
  • a thermal insulation structure is disposed outside the liquid aluminum chamber.
  • Nozzle heaters are further disposed outside of the array nozzles.
  • the movable condensing mechanism comprises: a condensing table disposed right facing the array nozzles, a two-dimensional movement controller which is vertically movable and disposed under the condensing table, and a downward movement controller, wherein the two-dimensional movement controller and the downward movement controller respectively are connected to the controller and receive two-dimensional movement command and vertical movement command so as to realize three-dimensional movement.
  • the setting of being vertically movable is realized by the downward movement controller disposed under the two-dimensional movement controller.
  • a cooling liquid flow channel is disposed inside the condensing table.
  • the controller comprises: a movement controller and a general controller, wherein the movement controller is connected to the general controller and transmits movement information of the movable condensing mechanism, and the general controller is connected with the release controller and the vacuum pump respectively, and transmits the information of the movement of the release controller and the information of the opening and closing of the vacuum pump; is connected with the two-dimensional movement controller and transmits the movement information of the two-dimensional movement controller; and is connected with the downward movement controller and transmits the movement information of the downward movement controller.
  • the present disclosure relates to an array-spraying additive manufacturing method for manufacturing large-sized equiaxed crystal aluminum alloy ingot based on the above apparatuses, comprising the following steps:
  • the present disclosure sprays a large volume of melts by generating negative pressure so as to form a stable continuous metal liquid column, making, through a design of an array arrangement of multiple nozzles, large-volume liquid aluminum evenly dispersed to form dozens to even hundreds of continuous liquid flows, and enables, by combining three-dimensional movement of a rapid condensing table below, large-area spreading of the thin liquid aluminum which is then continuously solidified to form ingots.
  • FIG. 1 is a schematic diagram of the structure of the present disclosure
  • FIG. 2 is a schematic diagram of the structure of nozzles
  • FIG. 3 is a schematic diagram of the movement path of a nozzle liquid column
  • FIG. 4 is a metallographic photo of Example 1
  • FIG. 5 is a metallographic photos illustrating semi-continuous casting
  • FIG. 6 and FIG. 7 are the metallographic photos of Example 2.
  • inlet gate 1 diversion trench 2 ; liquid aluminum 3 ; thermal insulation layer 4 ; gas inlet pipe 5 ; inert gas 6 ; nozzle heater 7 ; baffle plate 8 ; condensing table 9 ; two-dimensional movement controller 10 ; guide rail 11 ; support table 12 ; upward movement controller 13 ; plug pole 14 ; in-chamber heater 15 ; liquid aluminum chamber 16 ; nozzle 17 ; liquid lever meter 18 ; ingot 19 ; cooling water tube 20 ; airtight condensing chamber 21 ; movement controller 22 ; downward movement controller 23 ; vacuum pump 24 ; general controller 25 .
  • the example relates to an array-spraying additive manufacturing apparatus for manufacturing large-sized equiaxed crystal aluminum alloy ingot, comprising: an inlet gate 1 , a diversion trench 2 , liquid aluminum 3 , a thermal insulation layer 4 , a gas inlet pipe 5 , inert gas 6 , nozzle heaters 7 , a baffle plate 8 ; a condensing table 9 , a two-dimensional movement controller 10 , a guide rail 11 , a support table 12 , an upward movement controller 13 , a plug pole 14 , in-chamber heaters 15 , a liquid aluminum chamber 16 ; nozzles 17 , a liquid lever meter 18 ; an ingot 19 , a cooling water tube 20 , an airtight condensing chamber 21 , a movement controller 22 , a downward movement controller 23 , a vacuum pump 24 , and a general controller 25 .
  • the pressure of the liquid aluminum chamber is kept at 1 atm, and the airtight condensing chamber is completely sealed.
  • the pressure P can be adjusted by the vacuum pump 24 and the gas inlet pipe. During ingot preparation, the pressure P is less than 1 atm.
  • the nozzles 17 are arranged in array, with the nozzles having row spacing of W (W ⁇ 300 mm), the column spacing of L (L ⁇ 300 mm), and the nozzle aperture of D (0.2 mm ⁇ D ⁇ 30 mm).
  • the two-dimensional movement controller 10 enables the translational movement of the condensing table in the horizontal X and Y directions, where the moving speed is v(v ⁇ 1000 mm/s), and the maximum strokes in the two directions are X(X ⁇ 1 m) and Y(Y ⁇ 1 m) respectively.
  • the distance between adjacent passes is d(d ⁇ 30 mm).
  • the single-pass movement length of a single nozzle is equal to the nozzle column spacing L, while the total width of the movement of a single nozzle is equal to the nozzle row spacing W.
  • the downward movement controller 13 enables the movement of the condensing table in the vertical direction, where the moving speed is v 1 (v 1 ⁇ 50 mm/s), and the total stroke is Z(Z ⁇ 5 m).
  • the present example relates to an array-spraying additive manufacturing method for manufacturing large-sized equiaxed crystal aluminum alloy ingot, comprising the following steps:
  • settings comprise: the liquid aluminum temperature being 680° C., the nozzle diameter being 8 mm, the horizontal moving speed of the condensing table being 300 mm/s, the spray area of the array nozzles being 2 m*5 m, and the thickness of the ingot being 0.5 m, and it takes 40 minutes to prepare a large-sized ingot of 2 m*5 m*0.5 m.
  • the solidified structure of the ingot is dense, without macroscopic segregation, and is equiaxed crystal with an average grain size of 60-80 ⁇ m, as shown in FIG. 4 .
  • FIG. 5 shows the grain structure of the ingot prepared by semi-continuous casting. By comparison, the grain structure of the ingot prepared by the present method is significantly more refined.
  • Example 2 the same method as in Example 1 is applied to prepare A1-4.5Cu aluminum alloy ingot.
  • the settings comprise: liquid aluminum temperature being 700° C., the nozzle diameter being 6 mm, the horizontal moving speed of the condensing table being 260 mm/s, and the spray area of the array nozzles being 2 m*5 m, and the thickness of the ingot being 0.8 m, and it takes 60 minutes to prepare a large-sized ingot of 2 m*5 m*0.8 m.
  • the solidified structure of the ingot is dense, without macroscopic segregation, and is equiaxed crystal with an average grain size of 60-90 ⁇ m.
  • the metallographic photos at 1 ⁇ 4 and 1 ⁇ 2 along the center line of the cross section of the ingot are shown in FIG. 6 and FIG. 7 , respectively.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Physical Vapour Deposition (AREA)
US17/288,038 2018-11-16 2018-12-20 Array-spraying additive manufacturing apparatus and method for manufacturing large-sized equiaxed crystal aluminum alloy ingot Active US11524332B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201811363977.4A CN109202084B (zh) 2018-11-16 2018-11-16 阵列喷射式大尺寸全等轴晶铝合金锭增材制造装备及方法
CN201811363977.4 2018-11-16
PCT/CN2018/122252 WO2020098065A1 (zh) 2018-11-16 2018-12-20 阵列喷射式大尺寸全等轴晶铝合金锭增材制造装备及方法

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